Reorganization
Now that we have some statistics methods done, its time to do some refactoring! There are a few things to consider when deciding what methods and classes can be refactored and reorganized:
- Classes should be compact.
- Classes should have a single responsibility - you should be able to describe what a class is responsible for in one sentence.
- Use the tools we have learned recently when thinking about reorganization - Modules, Inheritance, and Plain Old Ruby Objects (POROs).
- Your code MUST NOT break the Law of Demeter.
As you refactor, you must maintain the integrity of your existing tests by adding tests for any new methods as you go. Every method should have at least one test! During this refactor, remember Mocks and Stubs - these can be considered part of a refactor; for example, to better test methods that rely on large datasets, or many helper methods.
